diff --git a/.github/workflows/run_unit_tests.yml b/.github/workflows/run_unit_tests.yml
index 4d73b425..f89fae86 100644
--- a/.github/workflows/run_unit_tests.yml
+++ b/.github/workflows/run_unit_tests.yml
@@ -41,9 +41,8 @@ jobs:
         PYTHONUTF8: 1
       run: |
         python -m pip install --upgrade pip
-        python -m pip install --no-deps -e .
         python -m pip install -r requirements.txt
-        python -m pip install -e .[dev]
+        python -m pip install -r dev-requirements.txt
     - name: List packages
       run:
         pip list
diff --git a/dev-requirements.txt b/dev-requirements.txt
new file mode 100644
index 00000000..80de8a36
--- /dev/null
+++ b/dev-requirements.txt
@@ -0,0 +1 @@
+coverage[toml]
diff --git a/pyproject.toml b/pyproject.toml
index 5fb6f322..85a79d99 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,9 +21,6 @@ dependencies = [
 [project.urls]
 Repository = "https://github.com/spine-tools/spine-items"
 
-[project.optional-dependencies]
-dev = ["coverage[toml]"]
-
 [build-system]
 requires = ["setuptools>=64", "setuptools_scm[toml]>=6.2", "wheel", "build"]
 build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
index 51082f94..c7002be8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
--e git+https://github.com/spine-tools/Spine-Database-API.git#egg=spinedb_api
--e git+https://github.com/spine-tools/spine-engine.git#egg=spine_engine
--e git+https://github.com/spine-tools/Spine-Toolbox.git#egg=spinetoolbox
+-e git+https://github.com/spine-tools/Spine-Database-API.git@toolbox_2522_enable_python_3.12#egg=spinedb_api
+-e git+https://github.com/spine-tools/spine-engine.git@toolbox_2522_enable_python_3.12#egg=spine_engine
+-e git+https://github.com/spine-tools/Spine-Toolbox.git@2522_enable_python_3.12#egg=spinetoolbox
 -e .